Dual gas burner head assembly



1965 M. E. WEBSTER 3,198,239

DUAL GAS BURNER HEAD ASSEMBLY Filed Jan. 25, 1963 2 Sheets-Sheet l INVENTOR MILO E WEBSTER 3, 1965 M. E. WEBSTER 3,198,239

DUAL GAS BURNER HEAD ASSEMBLY Filed Jan. 25, 1963 2 Sheets-Sheet 2 INVENTOR F .1 E M/LO E. WEBSTER dd did Patented Aug. 3, 1%65 sesame DUAL GAS BURNEQ Frill? at) AfiSEMELY Milo E. Webster, Rochester, N.Y., assignor to Berna-@- Matio Qorporation, Rochester, N.Y., a corporation of New York Filed Jan. 2 5, 1953, Ser. No. 253,830 '7 Qiairns. (Cl. 158-106 This invention relates to a burner head assembly such as can be mounted on a gas supply cylinder or on conduits Llfeading to a gas supply cylinder for delivery of gas thererom.

Burner head assemblies can be classified as either utility burners or pencil burners. In terms of function, the difference between these types of burners is that the utility burner gives flame of relatively large cross-sectional area, whereas the pencil burner givevs a flame which is of relatively small cross-sectional area and is more pointed at its outer extremity. Heretofore, the practice has been to mount either a utility burner head assembly or a pencil burner head assembly on the cylinder or line from which the gas supply is derived, and to alternately change from one to the other as the needs of the work being per-formed require. This practice of changing burner heads has the disadvantages of requiring time for the change-over, and susceptibility to the losing of one of the burners since the burner which is not being used is likely to have been misplaced. Also, the likelihood of a faulty connection of the burner being used and the cylinder or line is great, since the number of such connections made is considerable.

It is a principal object of the invention to provide a burner head assembly which is free of the above-mentioned disadvantages, and which has further advantages as will be apparent from the following description.

According to the invention, a burner head assembly comprises: i

(a) A connector for mounting the head assembly on a gas supply source, the connector including a first conduit means for delivery of gas from the cylinder;

(b) Two burners, one of which is a pencil flame burner and the other of which is a utility flame burner;

(c) Second and third conduit means interconnecting, respectively, the pencil burner and the utility burner with the first conduit means of the connector; and

1 =(d) Valve means for each the second conduit means and the third conduit means, whereby gas flow to the respective burners can be controlled.

In a preferred embodiment of the invention, the two burners are juxtaposed with their axes of flame delivery in parallel relationship.

'The invention is further described with reference to the accompanying drawings, wherein:

FIG. 1 is a plan view of a burner head assembly;

FiG. 2 is a side view of the burner, as seen when viewed in the direction of the arrows shown in FIG. 1;

FIG. 3 is a view of a connector for mounting on a gas supply means, such as a gas supply cylinder, and is partially in section to illustrate the conduit means through the connector;

FIG; 4 is a view, partially in cross-section, showing a utility burner mounted on a conduit means which, in turn, can be mounted on a connector; and

FIG. 5 is a view corresponding to FIG. 4, but for a pencil burner.

In the various views of the drawing, like reference characters refer to corresponding parts.

Referring to FIG. 1, the burner head assembly there shown comprises a connector 11, a pencil burner 12, a tube 13 interconnecting the pencil burner 12 and the connector 11, and a utility burner 14 and a tube 15 interconnecting the utility burner and the connector. In

this embodiment, the two burners are juxtaposed with their axes of flame delivery in parallel relationship, and the burners are'maintained fixed relative to each other, in such position, by the web or shroud 16. The web 16 is formed by an elongated plate bent back on itself to provide a top portion 17 and a bottom portion 18, and the forward part of the web converges and fits closely between the pencil burner tube 13 and the utility burner tube 15. The edge portion 22 of the rear part of the web are disposed laterally outwardly of the forward portion of the web and are bent inwardly so as to fit closely about the outer portions of the tubes 13 and 15. A screw 23 secures the two rear portions of the web together so that the inturned edge portions 22 grip the tubes 13 and 15 and press the tubes 13 and 15 into engagement with the forward part of the web 16, so that the tubes 13 and 15 are urged toward each other by the inturned edge portions 22 and are held apart in fixed spaced relation by the forward part of the web which is disposed between the tubes.

The connector 11 is shown in detail in FIG. 3. This connector is a tap connector as can be used for connecting the burner head assembly to a portable, disposable LP gas cylinder such as the cylinders sold under the trade name BernZ-O-Matic cylinders. This tap connector has a cylindrical recess having female threads 24 which can b threaded onto a corresponding male-threaded connection provided on LP cylinder. The tap connection also has a stem member 25 for extension into the discharge opening of the cylinder to press on the cylinder closure valve, which can be an ordinary automobile tire valve, and thereby open the cylinder for discharge of gas to the connector. The cylinder can be provided with a rubber O-ring in its discharge outlet and through which the stem 25 extends in gas-tight relation. Additionally, the tap connector is provided with a resilient washer 26 for engagement by the ,presser plate 27 of the stem 25. The connector 11 comprises the body portion 28 having tap Z9, and the stem 25 is threaded into the tap 2% so that the Jpresser plate 27 is in gas tight relation with the resilient washer 26. As can be best seen .in FIG. 1, the connector 11 is provided with a threaded recess for receiving an end portion of the tube 13 which interconnects the connector 11 and the pencil burner 12. A compression sleeve 3% is disposed on the end of the tube 13 received in the threaded recess 31, and a gland nut 32 is threaded into the recess to cooperate with the compression sleeve and hold the tube 13 securely in the recess 31. The tube 15 is secured in the connector 11 in a like manner and is received in a second recess in the connector which can be in all respects like the recess 31 for the tube 13.

The manner in which the threaded recess 31 and the threaded recess for the tube 15 are communicated with the tap connection 29 in the connector 11, for gas flow from the connector stem 25 to the respective tubes received in the recesses in which the tubes are secured, is illustrated in FIG. 3. Here the conduit means for such communication for one of the tubes is illustrated. The conduit means for communication 0t the other of the tubes can be the same. Thus, a passageway 33 passes from the tap 29 through the body portion 28 of the connector 11 to the recess wherein one of the tubes 13 or 15 is received. Needle valves 34 and 35 are provided for controlling the flow of gas through the conduits through the connector, such as conduit 33. The needle valve 34 is shown in detail in FIG. 3, and is of conventional construction, comprising a knurled knob 34a, stem portion 36 and needle plug 37, as well as the O-ring seal 38.

The utility burner and the pencil burner can be, respectively, of known construction for such burners. Thus,

a each of these burners can comprise a cylindrical body portion open at its forward end for issuance of flame and receiving its conduit for gas supply in its rear end. An orifice or gas spud can be disposed in the rear end of the body portion, and lateral air intake openings can extend through the sleeve just downstream of the gas spud. The portion of the gas passageway axially through the body portion of the burner, which is adjacent the spud can be of reduced diameter with respect to the diameter of the opening at the open forward end of the burner, and

this portion of reduced diameter can serve as a mixing chamber for providing thorough mixing of the air-gas mixture. For a pencil burner, the body portion between the lateral air intake openings and the opened forward end of the burner can be imper-forate while for the utility burner, the body portion thereof between the lateral openlugs and the open forward end, can be perforated for passage of air laterally through the body portion. The pencil burner can, and preferably doe-s include a jet portion downstream of the lateral air intake openings for directing air-gas mixture to the open end of the pencil burner.

A utility burner of a preferred construction for use in the combination of the invention is shown in FIG. 4. The utility burner comprises a body portion it having an open forward end 4-1 for issuance of the flame, and a rear portion 42 having a threaded bore for receiving the threaded end of the tube 15. The tube presses the orifice or gas spud 43 into place in the rear end of the burner body portion, and just downstream of the gas spud, lateral air intake openings 44- are provided. Downstream of the lateral intake openings 44, mixing of the air and gas occurs, and the air-gas mixture then flows into the sleeve 45 of the burner. The sleeve 45 is of diameter substantially that of the open forward end 4-1 and extends a substantial distance axially rearwardly from the forward opening 41,

The passageway intermediate the gas spud 43 and the sleeve 45 comprises a rear section 46, an intermediate section 47, and a forward section 48. Each of these sections is of uniform diameter, and the intermediate section 47 is of the smallest diameter. There is a conically shaped enlargement 49 between the intermediate portion of the passage 47 and the forward end portion 48, and there is a second conical enlargement 54 between the said forward end portion 48 and the sleeve 45. The angle of the conical enlargement 49 and the conical enlargement St) is substantially the same. In addition to the lateral air intake openings 44, the burner is provided with the lateral intake openings 51 which extend through the sleeve 45. The utility head as shown in FIG. 4 and as is described here, is in accordance with my copending application Serial No. 819,369, filed June 10, 1959, now Patent No. 3,078,369.

A. preferred construction for the pencil burner is shown in FIG. 5. As is here shown, the tube 13 is threaded into a threaded recess in the rear end of the pencil burner 12, and secures the gas spud or orifice 60 in place in the rear portion of the burner. Immediately downstream of the gas spud there are a plurality of lateral air intakes which extends through the body portion. The gas passageway through the burner downstream of the lateral air intake openings 61 is of reduced cross-section and provides a mixing chamber 62, wherein the air and gas are thoroughly mixed. Downstream of the mixing chamber 62, there is a jet fitting 63, and secured to the jet fitting by detents 64a is a shield 65 which provides the passageway from the jet fitting to the open end 66 of the burner. The jet fitting 63 includes a main jet 64 which is coaxial with the passageway through the burn er, and further includes a plurality of small jets disposed at spaced intervals on a circle coaxial with the main jet 64. Further, the jet fitting 63 is provided with radial passageways 68 which permit the flow of a small quantity of the air-gas mixture therethrough for passage through the annular space between the jet fitting 63 and the sleeve 65.

The sleeve 65 of the pencil burner is imperfor-ate so that all of the air for the burning in the pencil burner is taken in through the lateral air inlets 61. The lateral air inlets 61 of the pencil burner can be more in number and larger in diameter than the lateral air inlets 44 of the utility burner. Thus, the lateral air inlets 61 can be six in number and can be 0.081 inch diameter, while the lateral air inlets can be three in number and can be 0.052 inch in diameter. The lateral openings in the sleeve 45 of the utility burner can be six in number and can be 0.14 inch diameter. The pencil burner does not have any lateral openings corresponding to the lateral openings 51 of the utility burner.

An advantage of a burner head assembly as is provided by the invention is that one burner can be lit from the other. With one burner in operation, the valve for the other burner can be opened and the flame of the burner first in operation will ignite the air-gas mixture issuing from the other burner. The burner which was burning initially can then be turned off. Thus, the burnor can be utilize-d in the manner that one burner, usually the utility burner, is used as a pilot for the other burner, usually the pencil burner. The spacing of the burners can be about inch from center line to center line and about 4 inch from the inside of the open end of the one to the inside or" the open end of the other, at their closest point.

If desired, the disposition of the two burners can be provided so that the flame spaces substantially intersect along the length of the flames. This construction facilitates the lighting of one from the other. Thus, the axes can be such that the axes of flame delivery intersect at an angle of about 5l0 While the invention has been described in respect to particular embodiments thereof, various modifications will occur to those skilled in the art, and it is desired to secure by these Letters Patent all such modifications as are within the scope of the appended claims.

What is claimed is:

l. A burner head assembly for a gas supply cylinder comprising:

(a) a connector for mounting the head assembly on a gas supply source, the connector including a first conduit means for delivery of gas from the cylinder;

(b) two burners, one of which includes means for providing a pencil flame and the other of which includes means for providing a utility flame;

(c) second and third conduit means in parallel flow relationship interconnecting, respectively, the pencil burner and the utility burner with said first conduit means of the connector;

((1) valve means for each of the second conduit means and the third conduit means operatively mounted in its conduit means for control of gas flow to the pencil burner and the utility burner; and

(e) the two burners being juxtaposed and including means to direct their flames in substantially parallel directions and arranged to permit lighting of either burner from the other.

2. A head assembly according to claim 2,, each of said burners comprising a cylindrical body portion open at its forward end for issuance of the flame and receiving its conduit means in its rear end, a passageway extending axially through said body portion for conveying gas from the rear end to the open forward end thereof, a portion of said passageway adjacent the rear end thereof being of reduced diameter with respect to the diameter of the pas sageway at the open end of the body portion, an orifice means for directing gas from the conduit through said portion of the passageway, lateral air intake means through the body portion and communicating with said portion of the passageway for supplying air for combustion, the body portion of the pencil burner between the lateral openings thereof and the open forward end thereof being imperforate, the body portion of the utility burner between the lateral openings thereof and the open forward end thereof being perforated for passage of air laterally therethrough.

3. A head assembly according to claim 1, each of said burners comprising a cylindrical body portion open at its forward end for issuance of the flame and receiving its conduit means in its rear end, a passageway extending axially through said body ponion for conveying gas from the rear end to the open forward end thereof, lateral air intake means through the body portion for supplying air for combustion, said pencil burner having a jet portion downstream of the lateral air intake openings for directing air-gas mixture to the open end of the pencil burner body portion, the pencil burner body portion downstream of said jet portion being imperforate, whereby to provide a flame of relatively small cross-sectional area, the utility burner body portion downstream of the lateral air intake means being perforate adjacent the forward open end thereof to provide a flame of relatively large cross-sectional area.

4. A head assembly according to claim ll, each of said burners comprising a cylindrical body portion open at its forward end for issuance of the flame and receiving its conduit means in its rear end, a passageway extending axially through said body portion for conveying gas from the rear end to the open forward end thereof, lateral air intake means extending through the body portion adjacent the rear end thereof, a portion of said passageway adjacent and downstream of the air intake means comprising a mixing chamber for the air and gas, the utility burner passageway comprising a sleeve for receiving gasair mixture from its mixing chamber and conveying it to the open forward end thereof, the pencil burner comprising a jet for receiving gas-air mixture from its mixing chamber and directing the mixture as a jet to the open forward end thereof.

5. A head assembly according to claim 4, said sleeve of the utility burner having laterally extending air intake openings therein.

6. A head assembly according to claim d, the pencil burner having a shield extending between said jet and the open forward end thereof, said shield being imperforate.

7. A head assembly according to claim It, said second and third conduit means each comprising a tube interconnesting the connector and its burner, said assembly further comprising a web disposed between and engaging said tubes holding them in relatively fixed positions.

References Cited by the Examiner UNITED STATES PATENTS 979,335 12/10 Reid. r 1,329,270 1/20 Elias et al 158-27.5 2,673,602 3/54 Scorah 158-405 X 2,683,484 7/54 Falligant 126-38 X 2,712,819 7/55 Rosen l58-111 X FOREIGN PATENTS 85,471 6/20 Switzerland.

FREDERICK L. MATTESON, 111., Primary Examiner.

MEYER PERLIN, JAMES W, WESTHAVER,

Examiners.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,198,239 August 3, 1965 Milo E. Webster It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 3, line 54, for "Patent Non 3,078,369" read Patent No 3,0 8, 915

Signed and sealed this 5th day of April 1966.

EAL)

test:

NEST W. SWIDER EDWARD J. BRENNER testing Officer Commissioner of Patents 

1. A BURNER HEAD ASSEMBLY FOR A GAS SUPPLY CYLINDER COMPRISING: (A) A CONNECTOR FOR MOUNTING THE HEAD ASSEMBLY ON A GAS SUPPLY SOURCE, THE CONNECTOR INCLUDING A FIRST CONDUIT MEANS FOR DELIVERY OF GAS FROM THE CYLINDER; (B) TWO BURNERS, ONE OF WHICH INCLUDES MEANS FOR PROVIDING A PENCIL FLAME AND THE OTHER OF WHICH INCLUDES MEANS FOR PROVIDING A UTILITY FLAME; (C) SECOND AND THIRD CONDUIT MEANS IN PARALLEL FLOW RELATIONSHIP INTERCONNECTING, RESPECTIVELY, THE PENCIL BURNER AND THE UTILITY BURNER WITH SAID FIRST CONDUIT MEANS OF THE CONNECTOR; (D) VALVE MEANS FOR EACH OF THE SECOND CONDUIT MEANS AND THE THIRD CONDUIT MEANS OPERATIVELY MOUNTED IN ITS CONDUIT MEANS FOR CONTROL OF GAS FLOW TO THE PENCIL BURNER AND THE UTILITY BURNER; AND (E) THE TWO BURNERS BEING JUXTAPOSED AND INCLUDING MEANS TO DIRECT THEIR FLAMES IN SUBSTANTIALLY PARALLEL DIRECTIONS AND ARRANGED TO PERMIT LIGHTING OF EITHER BURNER FROM THE OTHER. 